The Dolphins allow 82 yards per game rushing. They play a physical 3-4 in which outside linebackers Joey Porter and Matt Roth drop down to rush in passing situations. Porter has 5½ sacks. Roth has two. The Dolphins have 12. “It (blocking) is extremely important because of the two edges (Porter and Roth),” coach Gary Kubiak said. “One of them has been one of the top pass rushers in the NFL over the last 10 to 12 years, and the kid on the other side is a defensive end they moved to linebacker. “You’ve got two very big edges, and your backs will have to step up and protect the ball.” On the rise The coaches have been rotating defensive linemen, trying to find the best combination to go with Mario Williams, their only consistent pass rusher. Tackle Amobi Okoye had his playing time reduced to keep him fresh. DelJuan Robinson rotated with Okoye. “I thought he played his best game of the year,” coach Gary Kubiak said about Okoye. “All we did was to limit his reps. We thought he was on the field too much and was losing some effectiveness as a pass rusher on third downs. “DelJuan had been playing very, very well. We spotted him on a lot of situations inside, and I think it made Amobi play better.” The improvement of young defensive linemen like Okoye, Robinson, Earl Cochran and Tim Bulman is imperative if the Texans hope to improve their pass rush. Injury update Running back Chris Taylor (quad), tight end Mark Bruener (hamstring) and safety Dominique Barber (hamstring) didn’t practice Friday and probably won’t play against Miami. The good news is that safety Will Demps, who missed the Indianapolis game because of a hamstring injury, should return against Miami.